#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<assert.h>
char* my_strcpy(char* dest, char* src)
{
	assert(dest && src);
	char* tmp = dest;
	while (*dest++ = *src++);
	return tmp;

}
int main()
{
	char string1[] = "hello";
	char string2[] = " ";
	char *p=NULL;
	printf("%s", my_strcpy(string2, string1));
}